announcement-test/lib/bulletin_model/cache.rb

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module BulletinModel
module Cache
require 'active_support/concern'
extend ActiveSupport::Concern
included do
before_save :do_before_save
end
def do_before_save
if self.class == SubPart
AnnsCache.where(parent_id:self.id).destroy
elsif self.class == Bulletin
AnnsCache.all.destroy
end
end
end
end